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2015 GMC Sierra 3500 HD Crew Cab Review

Get Your Fair Purchase Price See actual transaction prices, explore total cost to own, projected resale value and more. See what you should pay

2015 GMC Sierra 3500 HD Crew Cab Expert Review

By

When you need a full-size truck to haul heavy objects, the muscle provided by the 2015 GMC Sierra HD will be more than sufficient. Like the 2015 Chevrolet Silverado 2500 and 3500 HD, the Sierra HD is General Motors' other answer the Ford F-Series and Ram HD trucks. Both the Sierra 2500 and 3500 HD offer you the choice of a 6.0-liter V8 gasoline engine or a 6.6-liter Duramax turbodiesel V8, as well as rear-wheel-drive and 4-wheel-drive configurations. The choices go on from different cab configurations and bed lengths to trim levels. Even though it's not the best heavy-duty truck in its class, the Sierra HD offers plenty of muscle to get the job done.

You'll Like This Car If...

This truck was built to help you tow heavy things on a daily basis, whether it's short or long distances. Whatever the job calls for, the 2015 GMC Sierra will get it done.

You May Not Like This Car If...

There's not a whole lot of daylight between the Sierra and its more mainstream heavy-duty truck cousin, the Silverado. Like the Silverado, the Sierra HD doesn't lead the class in towing numbers, either.

How It Ranks

#17

out of 36

Horsepower

#22

out of 33

Consumer Ratings
View all rankings

Consumer Rating

8.6 out of 10
View all
consumer ratings
2015 GMC Sierra 3500 HD Crew Cab Low/wide front photo What's New for 2015

Both the interior and exterior have been redesigned to match that of the Sierra light-duty full-size truck launched last year. The CornerStep bumper and LED taillights in the bed also join the fray.

Driving the Sierra 3500 HD Crew Cab
2015 GMC Sierra 3500 HD Crew Cab Front angle view photo

Driving Impressions When we spent some time with the 2015 Sierra HD, the drive route consisted mostly of long highway stretches and the miles slipped by thanks to the spacious cabin and...

... a drivetrain that did its part to keep quiet. After a few hours of seat time with and without a trailer in tow, we never felt worse for wear. After we had our fill of towing everyday things like the fifth wheel, we hooked up to a trailer carrying 10,000 pounds and drove GMC's heavy-duty truck up and down a steep grade, rising as high as 5,000 feet above sea level at one point. The full-size Sierra HD demonstrated that it can control just about anything you'll ever need to tow. Each trailer had minimal wag, and the 6-speed Allison automatic transmission (paired with the Duramax) working in conjunction with an exhaust brake kept everything under control going downhill.

INTERIOR
An all-new upright instrument cluster features six gauges and a slew of large, easy-to-use rubberized knobs responsible for various things like climate control and radio volume. Ambient lighting illuminates all of the vital switches in the cabin, making each easier to locate when driving at night.

6.6-LITER DURAMAX ENGINE
Paired with a 6-speed Allison automatic transmission, the Duramax turbodiesel engine runs strong and quiet, all while providing power on demand in an even fashion.

2015 GMC Sierra 3500 HD Crew Cab Details
2015 GMC Sierra 3500 HD Crew Cab Dashboard, center console, gear shifter view photo Interior

Major restyling points go to the 2015 GMC Sierra HD interior, and it was achingly overdue. The base model brings basic amenities like a front split-bench seat, air conditioning, and power windows and locks. Move up to the SLE and you'll get features like a leather steering wheel and rubberized vinyl floor mats. The top-tier SLT trim offers everything mentioned plus dual-zone climate control, a high-capacity air cleaner, and a suspension package. Then there's the Denali trim, which is GMC's halo trim across the board. It brings things like contrast stitching, perforated leather seats, and aluminum trim on the instrument panel.

Exterior
2015 GMC Sierra 3500 HD Crew Cab photo

Besides the interior, the Sierra HD's exterior styling is a major change for the 2015 model year. Like the interior, the exterior styling of the Sierra HD now more closely reflects that of its light-duty offering. Headlights with LED running lights, a more prominent grille (a common theme in the pickup truck segment, lately), CornerStep rear bumper, and a raised power-dome hood are some noticeable new additions when just looking at the Sierra HD. The same two models, the 2500 and 3500 heavy-duty, are still offered.

Notable Equipment
Standard Equipment

With the base Sierra HD truck, you get a robust V8 engine, antilock disc brakes, air conditioning, and stability control. An automatic locking rear differential is also standard on all Sierra HD trucks with the exception of the 2500 HD base model. Climbing up the trim ladder brings you leather seats, steering-wheel-mounted controls, and Bluetooth. Both Sierra 2500 and 3500 HD models equipped with a Duramax engine also get an all-new electric assist heater, which helps to warm the cabin quickly.

Optional Equipment

The 6.6-liter V8 Duramax turbodiesel engine is, without question, the option to get when outfitting your 2015 Sierra 2500 or 3500 HD. Going with the Duramax engine and 4-wheel drive will save you some major headaches in the future. Other notable options for the 2500 and 3500 truck include a touch-screen navigation system, an EZ-Lift tailgate, and a snow-plow prep package.

Under the Hood
2015 GMC Sierra 3500 HD Crew Cab Engine photo

A 6.0-liter V8 gasoline engine or a 6.6-liter Duramax turbodiesel V8 engine provide power to the 2015 GMC Sierra HD. A 6.0-liter V8 powered by compressed natural gas (CNG) is also available, if that's how you roll. Rated at 360 horsepower and 380 lb-ft of torque, the gasoline engine is stout in its own right, but the Duramax diesel is the real star of the show. Power numbers for the 6.6-liter Duramax turbodiesel V8 check in at 397 horsepower and 765 lb-ft of twist. The Duramax engine also brings an exhaust braking system that helps keep the Sierra HD's speed in check going downhill. A 6-speed automatic transmission reports for duty with either engine, but the Duramax gets the added shift-technology benefits of an Allison 6-speed automatic.

6.0-liter CNG V8
301 horsepower @ 5,000
333 lb-ft of torque @ 4,200
EPA city/highway fuel economy: NA

6.0-liter V8
360 horsepower @ 3,000
380 lb-ft of torque @ 4,200
EPA city/highway fuel economy: NA

6.6-liter turbodiesel V8
397 horsepower @ 4,200 rpm
765 lb-ft of torque @ 1,600 rpm
EPA city/highway fuel economy: NA

If you just want to get into a 2015 GMC Sierra HD, you can do so by spending as little as $35,740. At the other end of the spectrum, if you're looking to drop some serious coin, go with a Sierra Denali 3500 HD crew cab, long box. You won't have any issues clearing the $65,000 mark that way. That number may bring a little sticker shock at first, but it does fall in line with the most plush full-size truck offerings from Ford and Ram. Before buying, be sure to check the Kelley Blue Book Fair Purchase Price to see what others in your area are paying for a 2015 Sierra HD. The resale value of the Sierra HD is also in line with the competition, but opting to go with the Duramax diesel engine will help keep the resale value up.

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2015 GMC Sierra 3500 Consumer Reviews

Overall Rating
8.6
Out of 10

Based on 41 Ratings for the 2014 - 2015 models.

Review this car
  • Value
    8.4/10
    Quality
    9.0/10
  • Reliability
    9.1/10
    Performance
    8.7/10
  • Comfort
    9.1/10
    Styling
    9.0/10

Exceptional truck and great so far

By on Friday, April 17, 2015

I own this car - My approximate mileage is 16,000

10 9.0
overall rating 9 of 10rating details

Reviewer Ratings

Overall Rating
9/10
Value
6/10
Reliability
10/10
Quality
9/10
Performance
8/10
Styling
9/10
Comfort
9/10

Pros: "Quiet, capable, comfortable"

Cons: "Base V6 not up to serious loads"

Likely to recommend this car? (1-10): 10

"I now have 16,000 miles on my 2014 GMC Sierra 1500 Double Cab 4x4 All-Terrain Edition and can give a decent review. I purchased it with 3k miles on it and saved a bundle over the cost of a new one. This is my first GMC. I have owned Chevy, Dodge, and Ford. My last one being a 2004 F-150 XLT Crew Cab that had almost 200K miles when I gave it to my son. Hopefully this one will do as well. I looked at all the competition and the GMC seemed to offer the biggest bang for the buck. Mine has the SLE package, 20” wheels and the All-Terrain package which includes most everything I can ever imagine needing and much more luxurious that I am used to in a truck. I have a BMW and this is honestly better equipped. It has been flawless as far as reliability of the vehicle. No issues at all. My biggest regret is not shopping around for a 5.3 engine version. This one has base 6 cyl and it is lacking for power when trying to haul a heavy trailer. Without a load the engine is fine but if you’re going to haul, definitely look for one with the V8 engine options. Some have complained the headlights are weak but they seem fine to me. The sets seem a bit thin on padding but I have covercraft seat covers that include ¼ foam and they made a huge difference in long trip comfort. The lack of rear vents for the heating and AC seems to be the most foolish design flaw I have noticed. Kids in the back complain and BTW-kids are the only ones that will be comfortable in the back seat of the double-cab version. It’s a tight fit for adults. My mileage has bested at 23.5 mpg highway over a 350 mile run. My average per tank has been about 17 with mixed driving. My Ford averaged 14. Not a huge improvement but not terrible for a full sized truck. The bright side for shoppers looking for a used truck, the depreciation hit seems larger than Fords for the first year or two so you can get a good price if you shop around. I live in Virginia and went to Michigan to get this one and the savings we well worth it. Now if I can just quit spending on accessories…."

11 people out of 20 found this review helpful

Duramax? Yes please!! Denali? Yes please!!!

By on Thursday, April 02, 2015

I own this car - My approximate mileage is 12,000

10 10.0
overall rating 10 of 10rating details

Reviewer Ratings

Overall Rating
10/10
Value
10/10
Reliability
10/10
Quality
10/10
Performance
10/10
Styling
10/10
Comfort
10/10

Pros: "Stylish exterior, quiet interior, smooth/powerful"

Cons: "Rear passenger ventilation"

Likely to recommend this car? (1-10): 10

"I have had my truck for almost a year now. I have around 12k miles, and the truck is practically flawless. First off, one thing this truck should of come with is rear passenger ventilation. Believe it or not, the trucks giant cabin does not come with rear vents. The interior is a major upgrade over previous models & the exterior styling speaks for itself, especially the Denali option. The Duramax 6.6 liter turbo-diesel combined with the Allison transmission provides the best value for your dollar. The cabin is quiet, the technology is vastly improved, the engine is powerful (397HP, 765ft-lb torque), and the ride is extremely smooth in comparison to other HD trucks. The Duramax diesel option is fully capable for towing just about anything, and rates as one of the best in its class. This is a truck you can plan on keeping for a looong time. A truck you can pass down to other generations of family that will last."

26 people out of 56 found this review helpful

Quiet cab, comfortable ride.

By on Tuesday, March 17, 2015

I own this car - My approximate mileage is 11,900

10 10.0
overall rating 10 of 10rating details

Reviewer Ratings

Overall Rating
10/10
Value
8/10
Reliability
9/10
Quality
8/10
Performance
8/10
Styling
9/10
Comfort
10/10

Likely to recommend this car? (1-10): 10

"Drives great, quiet interior, good gas milage, plenty of power. still getting use to the longer bed 6.5 vs my 2012 gmc's 5'8 bed. Truck pushes a little bit more than my previous truck in the corners. Overall great truck! I would bet the truck could be a little cheaper on the sticker price if GMC wouldn't have so many commercials on TV!"

17 people out of 30 found this review helpful

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